Sandbag was founded on this simple idea: Put your effort where it makes the biggest impact.

For all of us who see the exciting potential of a clean, renewable future and the corresponding threat of climate change 'meltdown', it can be frustrating that things aren't moving faster. We 'do our bit' but individuals' efforts don't add up to a clean energy revolution.

Not unless we can change the economy.

Change the prices of the clean and dirty options and you get the world moving in the right direction. This is where the 'biggest impact' is possible.

The good news is that this change has already begun in Europe. Thanks to policy makers levels of pollution are now controlled. Large scale polluters such a power companies and big industry must have permits to let them keep polluting. There's a plan for supplying fewer every year so that emissions fall over time, and the permits can be bought and sold, giving incentives to innovators and keeping the cost low. This emissions market has given CO2 a price.

After decades of discussion we now have a system to include carbon pollution in economic decisions. This is the opportunity to get things moving, to drive change across Europe and nudge the millions of daily decisions towards the greener, cleaner option.

But the system is failing to live up to its potential.

That's where Sandbag comes in. We shine a light on what is really going on in emissions trading and we push for improvements so that it delivers.

We hope you'll join us. With a finite number of permits being created, together we can both lobby to ensure fewer are handed out and also buy and cancel them ourselves.

Millions of tonnes of carbon emissions will or will not be pumped into the atmosphere based on the decisions of a few key people in Europe and other governments around the world. Together we can let them know we're watching and with the right pressure at the right time make a really big difference.

So that's what sandbag and this site are all about - for more background information continue reading here or check out the FAQs.